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(No MOdBl.) 2 Sheets-Sheet 1.

O. FOGELBERG & G. W. GRAVES.

ORGAN.

Patented June 6, 1882. F1531.

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CARL FOGELBERG AND GEORGE W. GRAVES, OF CAMBRIDGEPORT, MASS.

ORGAN.

SPECIFICATION forming part of Letters Patent No. 258,908, dated June 6, 1882.

Application filed January 14, 1881.

To all whom it may concern:

Be it known that we, CARL FOGELBERG and Granada W. GRAVES, both citizens of the United States, and both residing at ambridgeport, in the county ot'Middlesex and State of Massachusetts, havejointlyin vented certain new and useful Improvements in Musical Instruments; and we do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in musical wind instruments; and it consists, first, in combination with the main or common valve for each pipe or reed in organs, of an auxiliary relief-vent, valve, and stop adapted to be'operated by keys or levers so as first to open the auxiliary valve when its key or lever is first acted upon and subsequently open the main or common valve, by which arrangement the power necessary to open any such duplex valve is reduced to a minimum, owing to the fact that when the auxiliary valve is opened the pressure in the wind-chest and conductor to the pipe or reed is very much equalized, requiring very little pressure to be overcome, if any at all, in raising the main valve by the further depression of its key or lever. By the use of such improved valves on organ or reed instruments we avoid a sudden shock by the air on the pipe or reed, so as to prevent the tone being pitched too high when the valve is first opened.

The invention further consists, in combination with the mouths of pipes on pipe-organs, of a sliding bar adapted to be moved so as to open or close the mouths of the organ-pipes and serve as a stop. Such stop is to be operated by means of any of the ordinary intermediate mechanisms. The valves for the pipes or reeds are made entirely without springs, and to cause such springless valves to close automatically by the wind-pressure within the wind-chest as soon as the pressure on their cor responding keys or levers is relieved we locate the entrance of the windchannel to the wind- (No model.)

chest at the rear end of the first valve in the series, as will he further described; and the said valves, being without closing-springs, are very well adaptable for wind-instruments actuated by a perforated movable sheet, as the levers on such instruments, when their ends descend into the perforations on the movable sheet, have only to lift our improved valves without the resistance of closing-springs on said valves, by which arrangements such mechanical wind -instruments can be operated with a minimum of frictional resistance.

In the accompanyingdrawings, Figure 1 represents a plan view of the instrument. Fig. 2 represents a section on the line A 13, shown in Fig.1. Fig. 3 represents a section on the line C D, also shown in Fig. 1. Fig. 4 represents a front elevation, and Fig. 5 represents an enlarged section of one of the duplex valves.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

a is the wind-chest, in which the valves are located; and b is the wind-channel leading from suitable bellows or wind-compressors, which are, however, not shown in the drawings.

c c 0 represent the main or common valves, covering valve-holes (Z d at leading to wind-con duits e e c and organ-pipes fff f, as shown. Each valve 0 has its leather hinge 0 located in the end nearest to the wind-channel I), for the purpose set forth.

0 0 represent the auxiliary valves, hinged each to the upper side of each main valve 0., and adapted to cover the central relief-vent, 0', as and for the purpose set forth.

0 is a stop on the top of each "alve 0 to prevent the auxiliary valve c from being raised too far upward when acted upon by the pushpin 9, button h, and lever i, as shown in Fig. 3. The upper end of the push-pin g is hinged to the auxiliary valve 0', as shown in Fig. 5.

The operation of the improved duplex valve is as follows: The auxiliary valve 0 is raised by depressing the forward end, i, of the lever i until said valve comes in contact with its stop 0, when both the auxiliary and common valves are raised together to effect the desired purpose, as hereinbefore described.

F F F are the mouths of the pipes fff, as shown; and k is the sliding stop, hinged to the parallel arms It" 70 for the purpose described. By moving the sliding stop 70 down so as to cover the mouths of the pipes, such set of pipes is closed and no sounds are consequently produced,eveniftheircorrespondingvalves should be open and wind forced through such valves. The said stop may be arranged to slide vertically, as shown in the left-hand side of Fig. 3, or horizontally, as shownin the right-hand side of said Fig. 3, to equal advantage.

1 is the perforated sheet, provided with perforations Z l in the usual way. an is the rotaryfeed-roller for moving the perforated sheet Z, and below said feed-roller is located the verticallyadjustable roll a, on which one end of the perforated sheet l is wound, as shown in Fig. 3. The roller n is automatically held upward against the feed-roll m by means of a spring, 0, (one for each end of said roller) aeting on a movable rod or bar, that is guided ina slot, q,in the bearing q. The upper end of said rod or harp presses against the underside of the axle n of the roller n, as and for the purpose set forth.

m is a crank on the roller m, by means of which the said roller may be rotated, so asto feed the perforated sheet l forward to operate the levers i i and their respective valves.

1 I are springs acting on the forward ends of the levers i t to depress their projections i i into the perforations on the sheet 6.

T is a guide-roller for the perforated sheet I, as shown in Fig. 3, over which said sheet is guided from the roller a to the second roller, 8, attached to its shafts, which is free to rotate in bearings t t, one in each end of said roller. The roller sis provided, it'so desired, with a spring,

a, movable bare, and slot it, one in each end of said roller, for the purpose described; but this vertically-adjustable device may be dispensed with, and the said roller 8 maybe arranged to revolve loosely in fixed bearings to equal advantage. I

What we wish to secure by Letters Patent, and claim, is

1. In a pipe or reed organ, the herein-dcscribed improved valves, consisting of the main or common valve 0, with its relief-vent c, and auxiliary relief-valve c and stop 0, for the purpose set forth.

2. The herein-described full-stop, consisting of the swinging .bar 7r, pivoted to the case, as shown, in combination with the pipesff, as and for the purpose set forth.

In testimony whereof we have affixed our signatures in presence of two witnesses.

CARL FOGELBERG. GEORGE XV. GRAVES.

Witnesses:

ALBAN ANDREN, HENRY UHADBOURN. 

